public class Job03 {
    public static void main(String[] args) {
        for (int i = 1; i <= 9; i++) {
            for (int i1 = 1; i1 <= 9-i; i1++) {
                System.out.print(" ");
            }
            for (int i1 = 1; i1 <= 2*i-1; i1++) {
                System.out.print("▲ ");
            }
            System.out.println();
        }
        for (int i = 8; i >= 1; i--) {
            for (int i1 = 1; i1 <= 9-i; i1++) {
                System.out.print(" ");
            }
            for (int i1 = 1; i1 <= 2*i-1; i1++) {
                System.out.print("▲");
            }
            System.out.println();
        }
    }
}
